There are two important point of views on how to choose and use a reflector and reflective accessories.
1. USABILITY & ATTRACTIVENESS
The most important point is to choose reflective items, that actually will be used with ease. Reflector is useless if it is on top shelf once kids play outside.
As adults can often understand the importance of a reflector and voluntarily choose to wear one, this is not often case with kids or teens. For children, choose an item that is integrated and hard to forget or loose, like a back bag, beanie or gloves.
It is even better to have a reflective accessory chosen by children, so they will proudly wear them even with friends. As for adults, this is a motivational factor as well.
The driver can best see reflectors that are at knee high on adults (higher on kids). Hanging reflectors are freely suspended, detachable and fixed.
Ideally the reflector must be able to swing freely and be visible to the front, rear and side.
THE BIGGER THE BETTER
The more reflectors used, the better the motorist can see a pedestrian walking in the dark or twilight. You should also pay attention to the size of a reflective surface. With reflectors, bigger is definitely better.
You can never have too many reflectors!